Dangerous crystals steaming with fell corruption must be destroyed around Elderslade.
'${PLAYER}, I am deeply concerned about these fell rocks. I have consulted the Gem-cutter family tome, and I believe that these crystals are of an element called sarrowstone. The rocks you have found appear to have been altered in some way, however. There is some unholy power in these sarrowstones that seems responsible for the mutations in the Wargs you have been battling.
'I have crushed a few of these stones on my anvil and the corruption dissipates like dust when they are destroyed. I hear that you are heading north to battle more of the enemy at Malkorlash. Whilst there, shatter any sarrowstones you come across, my friend.'
The Malkorlash encampment is in the central north region of Elderslade.
You should destroy the sarrowstones in the Malkorlash encampment.
Mother Amma is in the forge at AnnĂ¢k-khurfu.
You should talk to Mother Amma.